2.6.2 Greatest hits from previous weeks

Greatest hits from previous weeks:

2.6.2.1 How to add a URL to a LaTeX bibtex file?

http://tex.stackexchange.com/questions/35977/how-to-add-a-url-to-a-latex-bibtex-file

I'm using bibtex for my bibliography in LaTeX. I have some URL's I need to cite in the paper. How do I add URLs into the .bib file? 
A typical section in my .bib file looks like this: 
...
 

- asked by Janusz (151 votes), answered by David (154 votes)

2.6.2.2 Cannot determine size of graphic

http://tex.stackexchange.com/questions/17734/cannot-determine-size-of-graphic

I'm trying to include graphics in my Latex-file, which I compiled with latex+dvipdf on OS X. Latex however returns this error: "Cannot determine size of graphic" 
My graphic is exported from  ...
 

- asked by Calle (63 votes), answered by Martin Scharrer (73 votes)